Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14475c2fde480659bcbdf6107114da6818df88ff3f6aa104a4211b7673bcabfc' 
  AND token = 'Y30UWKjCfTw/kKvSZWTLmSlgnSCMM9WtmHU2InU8584=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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