Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32e7c63a23767d7cd87a5880c9240779eb1cbd947c33e30de0cec274c5967065' 
  AND token = 'mjN+7AC1iKDA4gAG18dQN0p80hXu86ejygDoBipLmtw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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