Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'afb798078b5c32309bfe3e4a70fd8bd7b75fe81bdfc98cfb9062f04605aedd6c' 
  AND token = 'py8jvx0hMW2s8eDOhcZ7a4UDqpvwQAZ9mRP3VoStUnI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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