Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba0f54e2085c7f0479a6c56b6abff4965509e5290611ee2322d6bbbc2bf7919a' 
  AND token = 'x1qcNfYmbLkp1i0O6I58mQ0ZTtC5gJHVkNvmYiPgOUo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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