Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cf48edaaff87152db1d4822988c95ddfad8317f90b5ddbfb0517f8ff3370fb51' 
  AND token = 'uqJBNkWFWFBSLTYd6zd8Dcj9snT6dwIJYq0rMPAzn5E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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