Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '47c97547764087ae9cff5b0e9d426dc7031fc55f32c4eac846af739a1ed1c6b9' 
  AND token = '9Ytwpu/1faMN8r3uY7a+emA/Nr5SMfxZcXl4ASaX7eA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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