Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '31cd332d0f92c13e797f77fc9e6380fe55653ec528e1a32a98e04c9f74e9d55f' 
  AND token = 'zTxoAceLvS2usQHL5gYz3/mV6AOq0FNIoHpSUGRU8n0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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