Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6b2024932b3482bb892369bf1afe5c5ae4cad173d08656038ed288f94a90dcd6' 
  AND token = 'K6Vyg7cGcnqhuNKbF+fva2D4x2QVvFQNc4O0g70nuHU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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