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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '333ab99345715f610786ab38ca5f838b8c60be7a1c9abbb5fd0b02e8e820df6b' 
  AND token = 'XBJMJelF0VQjeX5Fs6nKChieTTw97KMzpPX6pHVk3sE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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