Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98b9c267978eeb279164f0d8ea322a4d336ba9ec4d1ac20e584c2a8cfe436bb0' 
  AND token = 'edDgO9C88zAhjMoTtAw5hl3m09He3EOxb7yYtPoubY0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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