Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '78f12bb347449ff9aef38ba6648bca4a2ef8bedf442a01610ba297f603dbb680' 
  AND token = 'OWJVHvlUxVxA2rx8ZpISoscuzpBlwhqsA32wMmc+If0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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