Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e5e3296e6591156c2ffd4b45c00206bcf11f516b349755dbe678c0d09366fa1' 
  AND token = 'TzDjD+eLHnPAG7rL4IoTkyZA0egXf4jQ+Iki9Bu5id0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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