Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b1c5e088bc3388cb5372062eb0c885e66854ca2c4d0891f3a19099a6556f7a7' 
  AND token = 'e5qqFKbZ1sfoVFeWs3AgoiIIOfx85WfWKDJPhSnC48A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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