Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ec5ed90372cef130ad96a6020a822340fb5f2d79d21d90fec6ad4364b4aa60e' 
  AND token = 'A4pzDDw1uMl4qLb5WUezAS6uqNAVvLDBMcwxenmgCmU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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