Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '8420b61439ed7cebf05910a17a95fcda74d919e31d6d4d93c34e83940e05db08' 
  AND token = 'A9rpdZehQEhPibGDbKbmqNyhDdALcIgWcb2h/uqCAR4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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