Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '33945660539d5c88bb64b0bb0097290149049eabfb23c88afdd574adeaa01cbc' 
  AND token = 'pKZ+am8xDXC0LxA6IccniFWu2BoM0L0DLilDVZDsCns=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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