Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1093d8745e3a608129108fea41bc4631ad292299d2997f9adebbc848c1e81ddb' 
  AND token = 'ItInzQvcXdzRxhvI29Sx4ao3MM3CiFogXbtMOXmyQe8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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