Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8c529497c2daa7ccfb249a7df5e74a05413ddd6c3bd1c00c6306aea97690dd54' 
  AND token = 'BEwKW7OyAmtGNcJgi0cHoqVSNsSuYmHgheEAYnJRG68=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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