SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aae0de54d462915fc92eb41ec58c8af3324e6be463a358bab67c189d342a8bbc' 
  AND token = 'GDObgyfG8KXt/fFXP86MqgBYgtVYdT+F3Khvqz5Eoog=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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