Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e5d34fe5efbc1c6ada35ca312d1589311af4ad0ad3187a35d8b0446ff8fe851' 
  AND token = 'AzgVOZiRaukfKBORqUkZ1hH516w0xvUJcvJIHP0VMB8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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