Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f363ff8454b16d45f0e213eab5c2b8ef253efbf05ca66a822f3cd5a4d42ca0e2' 
  AND token = '5SY3zDjz8phPtVHqLSAZYqDVqBWW0Qj2c2M0RuzoMJk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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