Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb5fd018bcbe90acee30f551ca9c3349de4754e98d70d66a8c1c509f28628fbb' 
  AND token = '9Wd9LRwFTw1rJYAaJTAIu9O9q2P0XT25cYESqi4dlQM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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