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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1a30e6f97c965e66e5103778d8766fc07296a901ef436c9c70fb6e89712bd66e' 
  AND token = 'GI+mzqm8qDwdErHnrnYL3kw5k8fLzS5RkFqV9DHAAnE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}