Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '53ff5c92c7be9089002a8fe3f13e8dbd336032cc21616cca76b8781f31e7d83f' 
  AND token = 'sgoGzBBBex+cVKYl7dSw3An4d8HIoJ3F9WxSPYN2O3A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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