Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3c2d07b9264702563f915cd56be85818894cd4f1687fbeb887afa019ea16aeb6' 
  AND token = 'hDiwIFK5REfxgp+FBDwW5k2cpSqa92cVR9GQR7LzSSc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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