Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '3c52e8b5ec154c5f8ec4bdce2b1d48a6c4efd7f9060a5cf0ecfde44e99ea25bd' 
  AND token = 'GBKjpNGqNuBvnIZUw+ninrfdBrLeM8YWtH6Sj4wQ5PQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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