Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '508e6b6a6ef9dbc776eea3a2edff87fdc3fe6375e0e8605d37602a9e3077b796' 
  AND token = '9TqtStCIeaqqk6gjuY40Z2i7NW/tSr6C345j2yhVH9U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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