Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '61b4d994884bfcdf5f9a35b84fa797354e4bf90c0a224e3734b43f2f0743e5fb' 
  AND token = 'G6tWoa12CqOKbITDgwchWVtKkABZknG55G8+U8lO7QM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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