Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '54a3271bfe15271e2709c3f7c1837db2752722fa4b71c969743df413637c4241' 
  AND token = 'XfSe3RRabe9vovEii82xONk0BbYdeU4gKeCqdrQ2iMI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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