Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee7f7099b186db5670d10021dcfbf868786961e8df8d219cfe54038fb3181314' 
  AND token = '6EbOGhED6qBGpPeMEz1fJ5mNnomznFdGAYsDoy9+GWg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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