Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '314397860bc4f87fe06fc9b26855cfbad619eb3b5b498f205084b5c1954c38af' 
  AND token = 'oNTy5Ndp/eoevsIbJL5MoXuGqIZ67DWgQLIM+TJwOQU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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