Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4d684e32cb9d4790d632ac83831d7da85820b769031aa992ce59234fc45af061' 
  AND token = 'kSKvbEWFAvWbhGELc+sFq0UbMpS5FRbU8XQS1p/339w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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