Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f92611f22ef49075c3273e03cf6728e26d69dbc62007c3430e7e6e5aecc4056f' 
  AND token = 'TM7ICfPrsItvCCX7qn7PHrBUO77lAACCs//QyIYzuGs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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