Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '57a872121ca081fffff6001e970ad9e132a57b8effb8c138220cc4637b9ed6f9' 
  AND token = 'kQYxRC0QluyIq7+jSdoXgMvPbssxZL78xPW4rLWPE/0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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