Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5bbbf43e49a84c1d038d0effb2a50dfae82bdc46b47285c644fbfdc75779c010' 
  AND token = 'nhpdbq4Hov4yremwFkG3n/OIdd0cWayCd/2LkgpL8NI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00056

JSON explain

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