Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30d7fb3e06eae932c7d307bcd0db44853d8a7f9cb46f1dd3b30e8fe085642118' 
  AND token = 'qUWl6XDMItc/6MP/3GCCukEtwr3qlQ7I+wPbc+vcjT0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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