Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '472c3cc3d62e808d0fc5abb50544e5d97aadda1fd8947f36c073d228c795c603' 
  AND token = 'yX19immoLHAtQVeYOz7mGtrrqzEYZk6zSxA6pf/dhL0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}