Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '35c4c0c3ddbb68f1da9d9b41181ab8df18e110fe0bdbb7dc9802c3a7226e7835' 
  AND token = 'qi9tjI0c9/M0LgPksKIixenwfqOgMJ4piwCE2RfuR/s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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