Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a4df91c2a65cd00edf400e85b58791898c29fc401b5c9401c4f3fdffcf5cf1cf' 
  AND token = '5abvIX+oqPeqKF5sMnNnVhkqSkOpb0UTzqRo11gKMOM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00107

JSON explain

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