Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7dd713d963a5a369c9536642d3c68aede684167215b36c28a41009c3eab455a7' 
  AND token = 'kYQKbqwdi4S8k78/ccw8R5N0jz6YjlNBsDKzcd4OAFg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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