Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '43970a96fa2b27de7b276379d2a5200a04880c49a1b2ad86f2e47f7e8e092adf' 
  AND token = 'dq7r3MkUyhLDJ8ryGUoaB7qthDvBgHn4bGH1V/BnGiE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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