Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c7747648499923ae0d8412b5e7103bcb1fbefd9652a9246222adb0b3c59dae54' 
  AND token = 'A7Igg3bKRO7YZTnra94dWvp4g0nI0b3b7VxaAZ1Po58=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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