Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4fcc84c0ddde0371b6c52e4e95364039ebb7076fdb6ca5161de2241e66dcd189' 
  AND token = '4OvdCoAgv2lNGLQun72Ht7RnXjuFmzAV1lEmX9dk2EA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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