Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4ba7d84997617d0761f4e7fa7dde9e8c450b116d193f4ddb8690387aadd2c7d8' 
  AND token = 'HQs4RSv6W45gLl/UYImQqrqlcj+tsbPzjL23+3eL7vE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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