Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3ead85ee34f7dc0f8c2b3ffe4d20b5f13844b7bef2a5137e4dff8938274c8a01' 
  AND token = 'LQE7JMfzyJMIK/X2tJsWXMRKuKHnklMAjK5R6+tGsqY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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