Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '212a75cdfd104dd4ab9401c398c43630e24539e1f4d832188766a9834e09ca2a' 
  AND token = 'Vu9SwqQ/p9OFLMw3sRj9Am7LdxMrjwuR/kG407UQIas=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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