SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2506ba0135ef6f22e935a53708ca871fcaef2483f83128c667257c878752976' 
  AND token = 'JoGXjT1SwO6MivSwI4YRZjChBd2fVxDT76DgDpy/JXo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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