Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f3803bbb37132060c749be88c06b25c9718a6d2e2cce51cbdcec650160a0583' 
  AND token = 'dgpFO8nSZouZryzAQDE++PxExs4TV6VgKhworE2GY6g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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