Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7f16682b727cfdd2fd8e75e3052499e91caad7b4f0e0dca3d27f3ad08dacfd20' 
  AND token = 'hJVUi62MACIOvyiKSFX2m60GJ/1lrImFc0UgC9+9n28=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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