Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ab7c73a576848b9d01a95f3e48918d3b8ef297e12fc2a3b298a69f51be7a3c0' 
  AND token = 'zoZVHnJ7mn9SU0FL8oWhSSSnxD03mKPk5RrnkNnhPgo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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