Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f494bbd5e5ae55acecf69bca10ff2a959467cdb3de534f458fa451da52ef98d6' 
  AND token = 'DKD7Pnezun/AQtmS7Ehgh+5iSH3YcS5+rnep2t6HA18=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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