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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3403376b4e0d277d4e40504440de20cea1e91b2f2a318cb97480843fae7ce533' 
  AND token = '06DLZksLmtgDQ0zikaYz0LRdsFcRixD6lCfoAKE2S+w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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