Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '284ea6060ed518861c16e76460c3ca897cd419ca061c64d850baad7d6826084a' 
  AND token = 'iA+s5eAiegfMt6hREwvJP43mNE/1FpW0dEUOXUEvYXM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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