Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f05a7ffe4cf0abb82476be860c42ade1b2dc412cc32b6676bb82f098b6a98af9' 
  AND token = 'X8/9KtzmryoxlKRMzam0FUTJSTwd9LFEQILANjjMmDM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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