Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '606436ccb94823839c0d23526a7866ebec960bc3d2cee8c93b86955e4bbb3ffb' 
  AND token = 'ecOOQ8vtdHK6qM6c5YF5EBHYmxCNGwcQcszd/C8UUCY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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