Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dc6d176457ca3ea04ac49dbc0dd705b6d7fe587f839188fd09b0bfa84bc2b5a6' 
  AND token = 'dWrtMWx1Hzm35Ptb39nSuq7ypUpQj3WHeWAiXO9MqEA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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