Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3512cca2161445d1748199ccd98d093c38b42896979b7f2ef44eb01e990b7779' 
  AND token = '1IwcJYTWEE+9oQU8iYU6UngMU2za7NVmw/B3kaxtj0k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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