Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd360994ea6b3f83c23e8f103f1b798a1a0b9dabd25cef6b82e4f0f9f5ca7b0d8' 
  AND token = 'J4MqINNetIZsLXXLgFS+R0qtQRktjN1xVuDrcKqtd9Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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