Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b0d71f35e5922235c5d609cc3214ad660ea4eb84b98be3ae1264952c4714d18f' 
  AND token = 'yAPmN8FOGZY2aGeqA+6ZZIx6hOIqHU4nwiAHf3wcaR4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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