Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b10fb981b5e391ccf376769dec4c5a23737be4e9b10da75093a08b068d8c5e94' 
  AND token = '0EfxhIxbrugYQiGDCXHhd2QqbJ9uA9oJxGFcTuEBwmk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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