Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ebd139d4d9ee15988a44cdefd8871dd7bcd31511751f5c09575dbee6a39afb4f' 
  AND token = '/fpjN2x16ss0gzggMIwfNxp3i6OGgeGpT9ob1hH0r4k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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