Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '172be7d831d25db220adb6f74612e0ec361ad71f8e0cde9b6526ae8cc73de1be' 
  AND token = '36e/H/ke645fTtjfyW97fh+tCAHloAZwvKuzj+pxov0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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