Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b7664ac1dd1d6c11334e169266c6a118096d7215be8c68a6b1e4c73f577788e6' 
  AND token = '5cFbGiv43gc1mjCgKIilZCrB3GQquVZjb6Sy6CHqFcM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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