Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '270f805bf306ff742ac7646c3d9868fdf9a1194929810605c8ac9c39a5684bc1' 
  AND token = 'w6V4Z/d03NY6nw/ayw8eKGo1/0wB2RMhaXnMPD44/9o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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