Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba228ede2c0aa63725a8a582e4296b1c8cdb0d3e7e2389d7b3f6c0b97c9d38a8' 
  AND token = 'zbZuJovlMBk4tBKMVz5AdzpQ7B54a8Ezk0avZMFk7c0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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