Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '38781ed9d172059156b717f8c23f9deecd771005d355e42203006d5cf83b1fb3' 
  AND token = 'a5Dldbo8k1CVzNIVBbMbcWtKh8ljeHuttu+4R/htDvo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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