Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7243cf4397a2c037e95c7fc1aa90ed828c7b19ab5106b03788cd7f411ed1aaa4' 
  AND token = 'pICmyohE64s73rNeLnkBYkvFx0ptWk4p97BrNiiAYk8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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