Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5610e9a95694d61b6e648405c8f18891ba077b6d3051b0085be6018d79945407' 
  AND token = 'X9VoED1VJMqIoKhyQdqXzQphYVBkH0a3+5lop0yCWdc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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