Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b3135836977bb78d180850c6587a871a4dded393c2382641fde4d771e7213686' 
  AND token = 'P9HUv2/7CFKWZ0WdBF1zCISRCq8R6sUNdb7D4S7ZwCE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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