Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '67033c7b96c4b12d1c3b63b3d379fd1eeeccaf52319bedf319ea235dc529dd0f' 
  AND token = 'OwJyQXLuLfkX0hcujkkjsCp4LQFoDjmv5Jqrc/XdUFQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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