Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d4ee301054aac9bc635c46cc202a7516479b66c3eae71a7781043f4329a2143' 
  AND token = 'rPYbTWR14NxWaefaZ7/iTZAdQJwg3QYUldVG1oxiIJY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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