Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '61dbbf3a5f0a870f86ef835803421d813092d1c7d3c154ea74a59d2451e3b71c' 
  AND token = 'W3QGFdrnegC80e0YbzjCTjv1LkXVOasmR9kFBsAJG50=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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