Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '87a889212367834bf35748fed337f77174a1cd8b74c3d047fd3b8bc27eff281c' 
  AND token = 'tN/ER5DFyhl8I4xnZqnD/HPz+XR34MYJ9LhqSry5P5k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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