Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f054e4b236f4f41a181411da33c5e82a5c1f421d3d21e596e43919a7ec26ceea' 
  AND token = 'UAJJYfRWyzIHynXpwUibbwK2VgkFbfXoSsLswWmm2BU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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