Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '45a15df31be08cf3e93ffa4552ba66dea114eb495890cba6cb4791c62877be8c' 
  AND token = 'k9ZcEfU7XN/8pEKMUtVeGDvCX6zKWYWgnHaTDHF+X/k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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