Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2aa88a35da31ff45a42ce08d3978e7fafd9bf2115bfebf9aaf5b748f06a5453b' 
  AND token = 'KifUS+z8WtV4PuMXhwWrgDuMDCcrMgFvQpJtVCH0mCs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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