Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '731a030ecd849bc5b0964249717bbdfa3caa39ce9dd49f364909656a569a3dc7' 
  AND token = 'Zbgpvfi7+31OLvz7m9/pxSJ590dq4OrmOcaoav/z5Qk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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