SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd090a0dac31648c8e571f2ad290794849a5d8dd85de4e353160a53e12b6f849c' 
  AND token = 'B+jxCwhGNAPflmI8BFVR6fMnAGE2Mv7yCadVfQ9YQ/I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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