Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e60b8bcb2a7f8c557891873abbb253ff0e195059b744f19a70d5a885954c819' 
  AND token = 'l7Lcl3jGB+6CdVqH8MjS6h9e+PmhENf/XSn0miDOIpI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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