Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0bb7e5f2d68d161999d87988f72081ea87f603e1e1d6695900ea1e9a2af7c683' 
  AND token = '7q9JfRJeJbaiupLaS8AK/Nh1PVAABNXaWPkUH8l031U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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