Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '710e40964cbdbebbdff7bcf1ff933d74f4c58cb2af49604a1e30a19d5d6cf9f4' 
  AND token = 'HJEiSGIzysOBQOYPqMzCXkWldt886Add7piaJgIF6jI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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