Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'eae56947579bf999b8db22b5394e8c2fe590416d1a634a981c9633ccb6957850' 
  AND token = '2uYXnEojwoQM3Qj4DGJRgxbHZ2AMZe0mHdRa1UTD89k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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