Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'efda0f4e6cfbb6aff1fa1fed9c08fbe011083af38000a0d1e195cc867f79c003' 
  AND token = 'xcrNB2hamjbX/Zeq+9qkmg1eVOIKv0j4oGc5E8Q2mz8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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