Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4fb4e9f996eabad686e5565764eed8cb3e3760fe1565fa922db7be31e23616ec' 
  AND token = '6ZHm+T5x06d7uXPIs/YbyGQ3aS1xvMqCVLG52qukwg0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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