Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5173d5cbcb3752e65a51611a4a10bd8cf83468c321c677d37c8732853c31f53a' 
  AND token = 'YWkhgohrIe/1p8rFaLM8Ezcn2iPi1el15aY/eH+WtXo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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