Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c9cf1f131c3de0a06981293c44104859e6667e8f497a4a57185c314e05534b82' 
  AND token = 'fr0pLbsd3iONaTJ54bR+jO4j7+1JTYmZAd+wF8aoaVo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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