Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '10c5073396f1c9e06f8daf141d2c40c64018e8bbb796812d8a190c8d605f5019' 
  AND token = 'E1YfTl1EAgerqwTUsNlypZYT8UxpFWssTQINq9bK6fc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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