Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30036236ec9285f71cd1e9a1979784c392213fd29b114fd49c726cd6d5307449' 
  AND token = '/33Ea02uvYuMYWYkbzMda93ujaDdbTSNHVltKmPwF1c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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