Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '33c518fdd4c99664917d1c260e0db39a281369cd4b22852c394688ea7f090051' 
  AND token = 'gcWh3EsY/AC+UWykapR7+UBHmOMITxw0NLxQF1FzOPM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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