Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '264be6f6538ffaea9bad1ab59afa17a92aa45aa16e287d484d7bbc70828e72fc' 
  AND token = 'wPBvooagNJSpfqAXHGt2Oh7rqKQkcQ9r49Vbk+Ktar4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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