Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa38600fb17aa1cbbaed6e3a53bb4204de4e3459cc691eb2b8c08eb9ccbb06e0' 
  AND token = 'pPiFPo1goWd6NQ0xsslILiuWbrL3KF5XKOzOGUuGB2M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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