Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '23f8a800593888a48127aa9d85419f46038e73d77a002bdc688217be97794417' 
  AND token = 'ZPZc5NtfIBNWH/nqQnt85UAthJpu1dw13WXvuPVKsUQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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