Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '31db09410c0dd5b4edf5eae3aef4e5cb4f9281074b9ea2d71a3b2d948253697c' 
  AND token = 'O1txb1GD3/rJ29BM+J4wjksaQvKccJ43LRaTw2d8SYs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00062

JSON explain

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