Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9f19895dcf56fb2e505f976a8c45c36ec682ffb3e217a2e3cdad19f168ea1bf3' 
  AND token = 'ktyNk4by+nbtlpjDF9QnfkduTkBpJjGRONBYHl025TM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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