Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '74b0639bddf4e786f089b12fcd1d1e5ed4fd9b58a5dd2c300291a1ea1da6ec6b' 
  AND token = 'WtVZRm5acQ1RKIottULc4YLhYGgyE3FKOosxNpi433k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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