Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa3d63d6eccd4f48e0157eb7de376a43626a16b715a1be723ccb4355ae42edd3' 
  AND token = 'z8SWpMtCTNlNTEqbiEkpAtIDH3VZUtcqXWZTlxHLpZw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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