Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '10fa84a1faed31ce08ba11f00aee9825ef031650b84df026eed6668adeee2e07' 
  AND token = 'ailHq2MtpXYHcErwuNWaPmyfrvMPJK6pEGKPBhi7V6U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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