Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd7e68ef8078af22e0caeae8be2a3be257c696b34b817625fcf5c714680199772' 
  AND token = 'm0WoKWvsc72smejh3QAycQ+2ElCZcVh9NJtzyYjlm6U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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