Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a53c3f57e4a70824e2df1d749f58313ff86acdd6248971da10a1306787a25d0f' 
  AND token = 'w4oA4iAx/wucQ5GVRMfF3rBWmSM9vUAtv86fmTwzBe0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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