Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '977aeb0a1fde82a555b43e4c38e129c68d961731449406fe679117d97a80850a' 
  AND token = 'YezqPhhuJcOlgfLhHf6ynBkUv7uJbPkEvQiR2an2DF4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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