Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db833a7363284be26f00810f02e9b036c7bae409da41c5fc3a875e67d6fa34bb' 
  AND token = '1z7fB/hanktqMfMtSXgbYEWNTKxtmXrZGYxdg3zlgqY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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