Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '19a63a1cea22d1468aaba26e8fcb4f592fcb2195b67b6e598fb32032355b5f43' 
  AND token = 'FQlIxn46jTFO1dTCjAPwuDrgmmxZlkWxGRAA1WXgvCM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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