Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60739daf2d079e58fb0ed07f2b72f79862df1a0d64458bffa598cc82311b73b4' 
  AND token = 'tc/AkIBacehDd3ApeLOA/XpFn1hZgIxDB5XIXBUkyVQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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