SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd7a05091f9d712e6d44550e699f68d1e22898b1286aec1224718e30fc39ef9f9' 
  AND token = '+rVv/eBIFglzgq6m0veoGHz9bHFkK+VXx9Td9YAAqEU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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