Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b337e061d05037f5f72e8b29e339164d203b1c35b9f72aca635ddd0e965f184' 
  AND token = 'fCuhqrnj0blqdGY00mSXBbVlYS/rQtw3COaHlucNXVE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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