Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7646a778dea5e0cbd1c154fe4c87a27e31078d2db464605afcb1fd16fbb4eff4' 
  AND token = 'Q0FZ+wHk2lgeF1rb27vRMuq0gMClObQrqwLMu9NXxkw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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