SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f71d6b5f0982458cc962a3a73d3bb96238b2f43a80346fa48e933fc49dbe3281' 
  AND token = 'uTobQesdvM8MC1S5+g7gRilNP+lnx5daqS8hv6QzVJI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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