Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd27a28c9c9543bbf8c78294dcf3dc643e2d6aa8391f5886a232d6c65f947cd09' 
  AND token = 'bfYwt3LmsHwfdDO3RCALolMp0IImzzrHj47h01Cyizg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}