Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc94688277ca165a3834bfcaed6992bb5e289690619e919fb538194473769c32' 
  AND token = 'f/gB3sRRmbq33JZrrZopgV6ADQBwmgccOwdykRo+5WE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}