Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f648275fc4edb8f6690aaa569fe239b057939d01834f441d3c3bdf12b5d8ec94' 
  AND token = '6CNIx71xOdsbmCyKHl8FchDOu8zebTPNA72cA56H64w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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