Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af01b5b45e8dc814d4493fa9b72d476eb0f679c23e8ed162715437f37ce9a07e' 
  AND token = 'PiukzW1BnYxKLW5tWi+XzeGMjVaxnplAbKgayS2+aAE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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