Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bb6de916c29eca33ed774ebadd5cc5c8313aa0301c48d7881a439244b843b8d6' 
  AND token = 'SZDM0MpU5C3W/G2W8ePlX90jy2MTEpPo3rd24F93mt4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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