Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '18acb84d0227781649ad25572569614b6ec72f9c1dd852a4e43eaa58a14c6c55' 
  AND token = 'uDNv2tRRndIFbBvw/xWuoY1Ux1o4u+4gSQdoul5fKpo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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