Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6ebceefd162a3f179013dbcdd0214b417227500bedc26a334e47970c146c4145' 
  AND token = '44vpu47PvaNC4+hvfN/m9YfBT41lg2NIti96jM8/uEQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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