Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd80be9fe0fb9d689c59a7b37618e9ba7efbe84d1399ab25a92b1e608250fe824' 
  AND token = 'UQkh01JiCPKHoIr5L5nXP4RK7jyYrA+hAUGfeUkkx4g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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