Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6801b8621db5c750f2a7b8e7e0caf03712817f9173abc0d58cb400745e9c3ce9' 
  AND token = 'lErgs+IvXkGe6mEYgVdQApNtYSF+Stvx2c3SdvSAs9c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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