Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9dc01b2495559806d4ecec70a8ae53fdb85a919fdf9be7b78fb958f7896d068e' 
  AND token = 'HRlNrfbdc2vEdpF94xKK5KH/c0iMZmqftD4/KZ7yRbs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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