Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32a2b3bf2df6a7cf98e9ce27b026e699f3578496e23fb96e9d673b6b40aa19ff' 
  AND token = '/YxJXl+yOyIyAfX7sH61Nsa03PzdQDtYqfVGZSr1yWo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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