Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a325c448781062012b6c9505fafef180a2d9db2c9b08f9ab330027d9eff83f7e' 
  AND token = 'QIIrxl5p8N95Iy6z2TR/LtuHT9KHH+CTnPAParLI10o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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