Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '824adf8a6faf9d8647adf3dfbcd8db347371daa880d61a5add4681d7b07bb765' 
  AND token = 'B4kPET76sdFp+YR3REx6s26dj6YkxL3fuddphvAnn/o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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