Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '368628e059a60adba1c1dbfd01991ba10d4f596a166c7908de953967287ba04a' 
  AND token = 'JmcxXSup1pZENxI11kMO23j8/mjsS2nJxoopi4COd+I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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