Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b9e58d1aeb7478bfa8eabdb238a2d9cc1c211bcbc55099adb7510213b15f38a' 
  AND token = 'v9Yoz7B0Fe+03eVDJO0vHDJQU76VpHju+u1sQM9RyQA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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