Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd5a12f812a6ae5a0425ca5d54cf41e9c23fc7ec081048c97083178b6dd2d5276' 
  AND token = '2c7enMnPnpw88p+VOHEB/F9MrBlxgTcczIszLWDWzFA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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