Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30cbc90db4c169f04b849e27bc87ca5cf60698918c3ff83bec3617cad001f972' 
  AND token = 'Ervcw6K/flXnW7IxZScI6KvTCXBaEbLkO27E9bujJtE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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