Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '80541cc69e7173c2218f74882e7a3b3fe1a5c6b09af3303f0ddc60fe8ef30a20' 
  AND token = 'PmbWhYKOWR48r0rCayC0pBuSMk7Xk3wIh9NicvTicxc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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