SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '02795aa43ad4de4bf17dda8bfe0f71ac3468bb80ae7d88ec62274eb2fd965161' 
  AND token = '1BUqvLjJBZikyHOAlyhqYWNOVL2yyFBSi8u++5fbZf8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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