Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '255070ccf40eafa9fb2588b39780282a23e740cc4802e333c0e4691cd56163ff' 
  AND token = 'Arpnh4pCEtzGWnuuWKeYTzi48V3LmroTnQ9gkZJGa8Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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