Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '890e941b82b2e4e76cb6d572e730a0b386086cbaf2c47ba0670e9b0e0ee13769' 
  AND token = '4C0ErcstdAlOh5lyFM1LmB8knVeJjgpUBD5xAB17wT0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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