Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a4690ca1edb0f6eba5584c40f64817669e2f0047f0efdcbf9782c59ad5d4131f' 
  AND token = 'XvoPzFCU8R+8PNRcbDFSPXxntdz1Rpc0T3Gwem+JswI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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