SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd25b9df774221abaa9a639f2a913ec4c01b9fb8726acb23a9d53ee74a8aa2ff8' 
  AND token = 'e/Gp/pupTBhdmLWnKaCKbOH+3URjD1X5k8oV2JZqY50=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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